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anonymous
 one year ago
the third term of an arithmetic is 21, and the eigth term is 56. the first term is...
anonymous
 one year ago
the third term of an arithmetic is 21, and the eigth term is 56. the first term is...

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.02 equations 21=a+2d 56=a+7d

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0use this for more reference . i am busy sorry contact me for help though ....XD http://openstudy.com/study#/updates/504cef62e4b02980ad8101c4

SolomonZelman
 one year ago
Best ResponseYou've already chosen the best response.0lets get a notation and everything I will denote (that all mathematicians denote) straight. notation read as meaning \(\large\color{black}{ \displaystyle a_1 }\) a of 1 the first term in a sequence \(\large\color{black}{ \displaystyle a_2 }\) a of 2 the second term in a sequence \(\large\color{black}{ \displaystyle a_3 }\) a of 3 the third term in a sequence and so forth... and IN GENERAL. \(\large\color{black}{ \displaystyle a_n }\) a of n any \(\rm n\) th term in a sequence

SolomonZelman
 one year ago
Best ResponseYou've already chosen the best response.0Now, in arithmetic sequence, all terms follow a certain pattern. You always add or subtract the same number to get to the next term. We refer to this number that you add or subtract (in an arithmetic sequence, to get to the next term) using a letter "d" (because it id the \(\rm d\)ifference between the terms)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0gice me medal i answered correctly
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