The 21st term of AP whose first two terms are -3 and 4 is: *
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n=21
a=first term= -3
d=common difference= 4-(-3)=7
T21= a+(n-1)d
= -3+(21-1)7
= -3+ (20)7
= -3+140
= 137
_*Therefore, the 21st term of the AP is 137*_
a=first term= -3
d=common difference= 4-(-3)=7
T21= a+(n-1)d
= -3+(21-1)7
= -3+ (20)7
= -3+140
= 137
_*Therefore, the 21st term of the AP is 137*_
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