Write the first four terms of an A.P. whose first term is -1 and common difference is -2.
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Step-by-step explanation:
given ,
a= -1
d= -2
a2= -1 + -2 = -3
a3= -1 + 2* -2 = -5
a4= -1 + 3* -2 = -7
the first four term are -1, -3, -5, -7
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