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what is the derivative for a constant?

zero?

yeah what about -10x?

is it -10?

yes

the answer to a is -10e^7-10x

is that the correct answer or your?

thats the correct answer but i just dont know how to get it

(a) should be -10

I think your missing some information

is it y = e^7 - 10x?

or e^(7-10x)?

i think we r suppose to use the u substitution method. no the answer is -10e^7-10x

what is the derivative of e^x?

yea

the first one should be e^(7 - 10x)

do you know the derivative of e^x?

no is it x?

no it is e^x

http://www.math.com/tables/derivatives/tableof.htm

do you know the chain rule?

yes

okay so what is the first one?

You can pretend its e^u and u = 7-10x

im not sure can u explain?

so what is the derivative of e^x?

e^x

right what about e^u?

e^u which is e^7-10x

right now you have to use the chain rule by taking du/dx and multiply to e^u

so du/dx * e^u is the answer.

ok i think i got it! :)