for AP the first two terms are - 3 and 4 find 21st term
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1st term a= -3
difference d= t2-t1= 4-(-3) = 7
To find 21st term
t21= a+(n-1)d
t21= -3+(20)7
t21= -3+140
∴21st term=137
Step-by-step explanation:
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