Question

12Th Term Is 50 Sum Of First 12 Term Is 336 .Find First Term And Common Difference

Answer 1

Answer:

a=6

d=4

Step-by-step explanation:

12th term = a+(n-1)d=50

a+(12-1)d=50

a+11d=50

sum of 12 terms = n/2 (2a+(n-1)d)=336

12/2 (2a+11d)=336

2a+11d=56

by solving

a=6

d=4