finding it hard to reverse double integral

[sinclairharry]

question is

int_{0 ¹} int₇ ^{7e^x} f(x,y) dy dx

i thought the answer to be int_{7 ⁰} int₀ ^ln(y/7) f(x,y) dx dy

but clearly the integral can't be from int ₇ ⁰ im just not sure were im going wrong nor really where to start

could any one help cheers

 

[Steven G]

question is

int_{0 ¹} int₇ ^{7e^x} f(x,y) dy dx

i thought the answer to be int_{7 ⁰} int₀ ^ln(y/7) f(x,y) dx dy

but clearly the integral can't be from int ₇ ⁰im just not sure were im going wrong nor really where to start

could any one help cheers

HI, both sets of limits are incorrect. Did you draw the region you are integrating over. Please show us this region. We will proceed from that point.