Question

find the 11 term from the last term towards the first term of the AP 10,7,4,,,,,,-62

Answer 1

11th = a + (n-1) d
11th = a + (11 - 1)d
11th = 10 + 10(-3)
11th = 10 - 30
11th = -20

Answer 2

an = a+ (n-1 ) d
-62 = 10 + (-3 n +3)
-62= 7-3n
69= 3n
n= 69÷3=23
a11 = 10 + 10×-3
a11= -20